isl_pw_templ.c

   1 #define xFN(TYPE,NAME) TYPE ## _ ## NAME
   2 #define FN(TYPE,NAME) xFN(TYPE,NAME)
   3 #define xS(TYPE,NAME) struct TYPE ## _ ## NAME
   4 #define S(TYPE,NAME) xS(TYPE,NAME)
   5
   6 #ifdef HAS_TYPE
   7 static __isl_give PW *FN(PW,alloc_)(__isl_take isl_dim *dim,
   8         enum isl_fold type, int n)
   9 #else
  10 static __isl_give PW *FN(PW,alloc_)(__isl_take isl_dim *dim, int n)
  11 #endif
  12 {
  13         struct PW *pw;
  14
  15         if (!dim)
  16                 return NULL;
  17         isl_assert(dim->ctx, n >= 0, goto error);
  18         pw = isl_alloc(dim->ctx, struct PW,
  19                         sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
  20         if (!pw)
  21                 goto error;
  22
  23         pw->ref = 1;
  24 #ifdef HAS_TYPE
  25         pw->type = type;
  26 #endif
  27         pw->size = n;
  28         pw->n = 0;
  29         pw->dim = dim;
  30         return pw;
  31 error:
  32         isl_dim_free(dim);
  33         return NULL;
  34 }
  35
  36 #ifdef HAS_TYPE
  37 __isl_give PW *FN(PW,zero)(__isl_take isl_dim *dim, enum isl_fold type)
  38 {
  39         return FN(PW,alloc_)(dim, type, 0);
  40 }
  41 #else
  42 __isl_give PW *FN(PW,zero)(__isl_take isl_dim *dim)
  43 {
  44         return FN(PW,alloc_)(dim, 0);
  45 }
  46 #endif
  47
  48 __isl_give PW *FN(PW,add_piece)(__isl_take PW *pw,
  49         __isl_take isl_set *set, __isl_take EL *el)
  50 {
  51         if (!pw || !set || !el)
  52                 goto error;
  53
  54         if (isl_set_fast_is_empty(set) || FN(EL,IS_ZERO)(el)) {
  55                 isl_set_free(set);
  56                 FN(EL,free)(el);
  57                 return pw;
  58         }
  59
  60 #ifdef HAS_TYPE
  61         if (pw->type != el->type)
  62                 isl_die(set->ctx, isl_error_invalid, "fold types don't match",
  63                         goto error);
  64 #endif
  65         isl_assert(set->ctx, isl_dim_equal(pw->dim, el->dim), goto error);
  66         isl_assert(set->ctx, pw->n < pw->size, goto error);
  67
  68         pw->p[pw->n].set = set;
  69         pw->p[pw->n].FIELD = el;
  70         pw->n++;
  71
  72         return pw;
  73 error:
  74         FN(PW,free)(pw);
  75         isl_set_free(set);
  76         FN(EL,free)(el);
  77         return NULL;
  78 }
  79
  80 #ifdef HAS_TYPE
  81 __isl_give PW *FN(PW,alloc)(enum isl_fold type,
  82         __isl_take isl_set *set, __isl_take EL *el)
  83 #else
  84 __isl_give PW *FN(PW,alloc)(__isl_take isl_set *set, __isl_take EL *el)
  85 #endif
  86 {
  87         PW *pw;
  88
  89         if (!set || !el)
  90                 goto error;
  91
  92 #ifdef HAS_TYPE
  93         pw = FN(PW,alloc_)(isl_set_get_dim(set), type, 1);
  94 #else
  95         pw = FN(PW,alloc_)(isl_set_get_dim(set), 1);
  96 #endif
  97
  98         return FN(PW,add_piece)(pw, set, el);
  99 error:
 100         isl_set_free(set);
 101         FN(EL,free)(el);
 102         return NULL;
 103 }
 104
 105 __isl_give PW *FN(PW,dup)(__isl_keep PW *pw)
 106 {
 107         int i;
 108         PW *dup;
 109
 110         if (!pw)
 111                 return NULL;
 112
 113 #ifdef HAS_TYPE
 114         dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->type, pw->n);
 115 #else
 116         dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->n);
 117 #endif
 118         if (!dup)
 119                 return NULL;
 120
 121         for (i = 0; i < pw->n; ++i)
 122                 dup = FN(PW,add_piece)(dup, isl_set_copy(pw->p[i].set),
 123                                             FN(EL,copy)(pw->p[i].FIELD));
 124
 125         return dup;
 126 error:
 127         FN(PW,free)(dup);
 128         return NULL;
 129 }
 130
 131 __isl_give PW *FN(PW,cow)(__isl_take PW *pw)
 132 {
 133         if (!pw)
 134                 return NULL;
 135
 136         if (pw->ref == 1)
 137                 return pw;
 138         pw->ref--;
 139         return FN(PW,dup)(pw);
 140 }
 141
 142 __isl_give PW *FN(PW,copy)(__isl_keep PW *pw)
 143 {
 144         if (!pw)
 145                 return NULL;
 146
 147         pw->ref++;
 148         return pw;
 149 }
 150
 151 void FN(PW,free)(__isl_take PW *pw)
 152 {
 153         int i;
 154
 155         if (!pw)
 156                 return;
 157         if (--pw->ref > 0)
 158                 return;
 159
 160         for (i = 0; i < pw->n; ++i) {
 161                 isl_set_free(pw->p[i].set);
 162                 FN(EL,free)(pw->p[i].FIELD);
 163         }
 164         isl_dim_free(pw->dim);
 165         free(pw);
 166 }
 167
 168 int FN(PW,is_zero)(__isl_keep PW *pw)
 169 {
 170         if (!pw)
 171                 return -1;
 172
 173         return pw->n == 0;
 174 }
 175
 176 __isl_give PW *FN(PW,add)(__isl_take PW *pw1, __isl_take PW *pw2)
 177 {
 178         int i, j, n;
 179         struct PW *res;
 180         isl_set *set;
 181
 182         if (!pw1 || !pw2)
 183                 goto error;
 184
 185 #ifdef HAS_TYPE
 186         if (pw1->type != pw2->type)
 187                 isl_die(pw1->dim->ctx, isl_error_invalid,
 188                         "fold types don't match", goto error);
 189 #endif
 190         isl_assert(pw1->dim->ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
 191
 192         if (FN(PW,is_zero)(pw1)) {
 193                 FN(PW,free)(pw1);
 194                 return pw2;
 195         }
 196
 197         if (FN(PW,is_zero)(pw2)) {
 198                 FN(PW,free)(pw2);
 199                 return pw1;
 200         }
 201
 202         n = (pw1->n + 1) * (pw2->n + 1);
 203 #ifdef HAS_TYPE
 204         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->type, n);
 205 #else
 206         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), n);
 207 #endif
 208
 209         for (i = 0; i < pw1->n; ++i) {
 210                 set = isl_set_copy(pw1->p[i].set);
 211                 for (j = 0; j < pw2->n; ++j) {
 212                         struct isl_set *common;
 213                         EL *sum;
 214                         set = isl_set_subtract(set,
 215                                         isl_set_copy(pw2->p[j].set));
 216                         common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
 217                                                 isl_set_copy(pw2->p[j].set));
 218                         if (isl_set_fast_is_empty(common)) {
 219                                 isl_set_free(common);
 220                                 continue;
 221                         }
 222
 223                         sum = FN(EL,add_on_domain)(common,
 224                                                    FN(EL,copy)(pw1->p[i].FIELD),
 225                                                    FN(EL,copy)(pw2->p[j].FIELD));
 226
 227                         res = FN(PW,add_piece)(res, common, sum);
 228                 }
 229                 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw1->p[i].FIELD));
 230         }
 231
 232         for (j = 0; j < pw2->n; ++j) {
 233                 set = isl_set_copy(pw2->p[j].set);
 234                 for (i = 0; i < pw1->n; ++i)
 235                         set = isl_set_subtract(set,
 236                                         isl_set_copy(pw1->p[i].set));
 237                 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw2->p[j].FIELD));
 238         }
 239
 240         FN(PW,free)(pw1);
 241         FN(PW,free)(pw2);
 242
 243         return res;
 244 error:
 245         FN(PW,free)(pw1);
 246         FN(PW,free)(pw2);
 247         return NULL;
 248 }
 249
 250 __isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
 251 {
 252         int i;
 253         PW *res;
 254
 255         if (!pw1 || !pw2)
 256                 goto error;
 257
 258 #ifdef HAS_TYPE
 259         if (pw1->type != pw2->type)
 260                 isl_die(pw1->dim->ctx, isl_error_invalid,
 261                         "fold types don't match", goto error);
 262 #endif
 263         isl_assert(pw1->dim->ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
 264
 265         if (FN(PW,is_zero)(pw1)) {
 266                 FN(PW,free)(pw1);
 267                 return pw2;
 268         }
 269
 270         if (FN(PW,is_zero)(pw2)) {
 271                 FN(PW,free)(pw2);
 272                 return pw1;
 273         }
 274
 275 #ifdef HAS_TYPE
 276         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->type, pw1->n + pw2->n);
 277 #else
 278         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->n + pw2->n);
 279 #endif
 280
 281         for (i = 0; i < pw1->n; ++i)
 282                 res = FN(PW,add_piece)(res,
 283                                 isl_set_copy(pw1->p[i].set),
 284                                 FN(EL,copy)(pw1->p[i].FIELD));
 285
 286         for (i = 0; i < pw2->n; ++i)
 287                 res = FN(PW,add_piece)(res,
 288                                 isl_set_copy(pw2->p[i].set),
 289                                 FN(EL,copy)(pw2->p[i].FIELD));
 290
 291         FN(PW,free)(pw1);
 292         FN(PW,free)(pw2);
 293
 294         return res;
 295 error:
 296         FN(PW,free)(pw1);
 297         FN(PW,free)(pw2);
 298         return NULL;
 299 }
 300
 301 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
 302         __isl_take isl_point *pnt)
 303 {
 304         int i;
 305         int found = 0;
 306         isl_qpolynomial *qp;
 307
 308         if (!pw || !pnt)
 309                 goto error;
 310         isl_assert(pnt->dim->ctx, isl_dim_equal(pnt->dim, pw->dim), goto error);
 311
 312         for (i = 0; i < pw->n; ++i) {
 313                 found = isl_set_contains_point(pw->p[i].set, pnt);
 314                 if (found < 0)
 315                         goto error;
 316                 if (found)
 317                         break;
 318         }
 319         if (found)
 320                 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
 321                                             isl_point_copy(pnt));
 322         else
 323                 qp = isl_qpolynomial_zero(isl_dim_copy(pw->dim));
 324         FN(PW,free)(pw);
 325         isl_point_free(pnt);
 326         return qp;
 327 error:
 328         FN(PW,free)(pw);
 329         isl_point_free(pnt);
 330         return NULL;
 331 }
 332
 333 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
 334 {
 335         int i;
 336         isl_set *dom;
 337
 338         if (!pw)
 339                 return NULL;
 340
 341         dom = isl_set_empty(isl_dim_copy(pw->dim));
 342         for (i = 0; i < pw->n; ++i)
 343                 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
 344
 345         FN(PW,free)(pw);
 346
 347         return dom;
 348 }
 349
 350 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw, __isl_take isl_set *set)
 351 {
 352         int i;
 353
 354         if (!pw || !set)
 355                 goto error;
 356
 357         if (pw->n == 0) {
 358                 isl_set_free(set);
 359                 return pw;
 360         }
 361
 362         pw = FN(PW,cow)(pw);
 363         if (!pw)
 364                 goto error;
 365
 366         for (i = pw->n - 1; i >= 0; --i) {
 367                 isl_basic_set *aff;
 368                 pw->p[i].set = isl_set_intersect(pw->p[i].set, isl_set_copy(set));
 369                 if (!pw->p[i].set)
 370                         goto error;
 371                 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
 372                 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
 373                                                                 aff);
 374                 if (isl_set_fast_is_empty(pw->p[i].set)) {
 375                         isl_set_free(pw->p[i].set);
 376                         FN(EL,free)(pw->p[i].FIELD);
 377                         if (i != pw->n - 1)
 378                                 pw->p[i] = pw->p[pw->n - 1];
 379                         pw->n--;
 380                 }
 381         }
 382
 383         isl_set_free(set);
 384         return pw;
 385 error:
 386         isl_set_free(set);
 387         FN(PW,free)(pw);
 388         return NULL;
 389 }
 390
 391 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
 392 {
 393         int i;
 394         isl_basic_set *hull = NULL;
 395
 396         if (!pw || !context)
 397                 goto error;
 398
 399         if (pw->n == 0) {
 400                 isl_set_free(context);
 401                 return pw;
 402         }
 403
 404         hull = isl_set_simple_hull(isl_set_copy(context));
 405
 406         pw = FN(PW,cow)(pw);
 407         if (!pw)
 408                 goto error;
 409
 410         for (i = 0; i < pw->n; ++i) {
 411                 pw->p[i].set = isl_set_gist_basic_set(pw->p[i].set,
 412                                                 isl_basic_set_copy(hull));
 413                 if (!pw->p[i].set)
 414                         goto error;
 415         }
 416
 417         isl_basic_set_free(hull);
 418         isl_set_free(context);
 419
 420         return pw;
 421 error:
 422         FN(PW,free)(pw);
 423         isl_basic_set_free(hull);
 424         isl_set_free(context);
 425         return NULL;
 426 }
 427
 428 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
 429 {
 430         int i, j;
 431
 432         if (!pw)
 433                 return NULL;
 434         if (pw->n == 0)
 435                 return pw;
 436
 437         for (i = pw->n - 1; i >= 0; --i) {
 438                 for (j = i - 1; j >= 0; --j) {
 439                         if (!FN(EL,is_equal)(pw->p[i].FIELD, pw->p[j].FIELD))
 440                                 continue;
 441                         pw->p[j].set = isl_set_union(pw->p[j].set,
 442                                                         pw->p[i].set);
 443                         FN(EL,free)(pw->p[i].FIELD);
 444                         if (i != pw->n - 1)
 445                                 pw->p[i] = pw->p[pw->n - 1];
 446                         pw->n--;
 447                         break;
 448                 }
 449                 if (j >= 0)
 450                         continue;
 451                 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
 452                 if (!pw->p[i].set)
 453                         goto error;
 454         }
 455
 456         return pw;
 457 error:
 458         FN(PW,free)(pw);
 459         return NULL;
 460 }
 461
 462 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
 463 {
 464         return pw ? pw->dim->ctx : NULL;
 465 }
 466
 467 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
 468         unsigned first, unsigned n)
 469 {
 470         int i;
 471
 472         if (!pw)
 473                 return -1;
 474         if (pw->n == 0 || n == 0)
 475                 return 0;
 476         for (i = 0; i < pw->n; ++i) {
 477                 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
 478                                                         type, first, n);
 479                 if (involves < 0 || involves)
 480                         return involves;
 481         }
 482         return 0;
 483 }
 484
 485 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
 486         enum isl_dim_type type, unsigned pos, const char *s)
 487 {
 488         int i;
 489
 490         pw = FN(PW,cow)(pw);
 491         if (!pw)
 492                 return NULL;
 493
 494         pw->dim = isl_dim_set_name(pw->dim, type, pos, s);
 495         if (!pw->dim)
 496                 goto error;
 497
 498         for (i = 0; i < pw->n; ++i) {
 499                 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set, type, pos, s);
 500                 if (!pw->p[i].set)
 501                         goto error;
 502                 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
 503                 if (!pw->p[i].FIELD)
 504                         goto error;
 505         }
 506
 507         return pw;
 508 error:
 509         FN(PW,free)(pw);
 510         return NULL;
 511 }
 512
 513 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
 514         enum isl_dim_type type, unsigned first, unsigned n)
 515 {
 516         int i;
 517
 518         if (!pw)
 519                 return NULL;
 520         if (n == 0 && !isl_dim_get_tuple_name(pw->dim, type))
 521                 return pw;
 522
 523         pw = FN(PW,cow)(pw);
 524         if (!pw)
 525                 return NULL;
 526         pw->dim = isl_dim_drop(pw->dim, type, first, n);
 527         if (!pw->dim)
 528                 goto error;
 529         for (i = 0; i < pw->n; ++i) {
 530                 pw->p[i].set = isl_set_drop(pw->p[i].set, type, first, n);
 531                 if (!pw->p[i].set)
 532                         goto error;
 533                 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
 534                 if (!pw->p[i].FIELD)
 535                         goto error;
 536         }
 537
 538         return pw;
 539 error:
 540         FN(PW,free)(pw);
 541         return NULL;
 542 }
 543
 544 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
 545         unsigned first, unsigned n)
 546 {
 547         int i;
 548
 549         if (!pw)
 550                 return NULL;
 551         if (n == 0 && !isl_dim_is_named_or_nested(pw->dim, type))
 552                 return pw;
 553
 554         pw = FN(PW,cow)(pw);
 555         if (!pw)
 556                 return NULL;
 557
 558         pw->dim = isl_dim_insert(pw->dim, type, first, n);
 559         if (!pw->dim)
 560                 goto error;
 561
 562         for (i = 0; i < pw->n; ++i) {
 563                 pw->p[i].set = isl_set_insert(pw->p[i].set, type, first, n);
 564                 if (!pw->p[i].set)
 565                         goto error;
 566                 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
 567                                                                 type, first, n);
 568                 if (!pw->p[i].FIELD)
 569                         goto error;
 570         }
 571
 572         return pw;
 573 error:
 574         FN(PW,free)(pw);
 575         return NULL;
 576 }
 577
 578 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
 579         enum isl_dim_type type, unsigned pos, isl_int v)
 580 {
 581         int i;
 582
 583         if (!pw)
 584                 return NULL;
 585
 586         pw = FN(PW,cow)(pw);
 587         if (!pw)
 588                 return NULL;
 589         for (i = 0; i < pw->n; ++i) {
 590                 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
 591                 if (!pw->p[i].set)
 592                         goto error;
 593         }
 594
 595         return pw;
 596 error:
 597         FN(PW,free)(pw);
 598         return NULL;
 599 }
 600
 601 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
 602 {
 603         return pw ? isl_dim_size(pw->dim, type) : 0;
 604 }
 605
 606 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
 607         enum isl_dim_type type, unsigned first, unsigned n)
 608 {
 609         int i;
 610
 611         if (!pw)
 612                 return NULL;
 613         if (n == 0)
 614                 return pw;
 615
 616         pw = FN(PW,cow)(pw);
 617         if (!pw)
 618                 return NULL;
 619         if (!pw->dim)
 620                 goto error;
 621         for (i = 0; i < pw->n; ++i) {
 622                 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
 623                 if (!pw->p[i].set)
 624                         goto error;
 625         }
 626
 627         return pw;
 628 error:
 629         FN(PW,free)(pw);
 630         return NULL;
 631 }
 632
 633 /* Compute the maximal value attained by the piecewise quasipolynomial
 634  * on its domain or zero if the domain is empty.
 635  * In the worst case, the domain is scanned completely,
 636  * so the domain is assumed to be bounded.
 637  */
 638 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
 639 {
 640         int i;
 641         isl_qpolynomial *opt;
 642
 643         if (!pw)
 644                 return NULL;
 645
 646         if (pw->n == 0) {
 647                 isl_dim *dim = isl_dim_copy(pw->dim);
 648                 FN(PW,free)(pw);
 649                 return isl_qpolynomial_zero(dim);
 650         }
 651
 652         opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
 653                                         isl_set_copy(pw->p[0].set), max);
 654         for (i = 1; i < pw->n; ++i) {
 655                 isl_qpolynomial *opt_i;
 656                 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
 657                                                 isl_set_copy(pw->p[i].set), max);
 658                 if (max)
 659                         opt = isl_qpolynomial_max_cst(opt, opt_i);
 660                 else
 661                         opt = isl_qpolynomial_min_cst(opt, opt_i);
 662         }
 663
 664         FN(PW,free)(pw);
 665         return opt;
 666 }
 667
 668 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
 669 {
 670         return FN(PW,opt)(pw, 1);
 671 }
 672
 673 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
 674 {
 675         return FN(PW,opt)(pw, 0);
 676 }
 677
 678 __isl_give isl_dim *FN(PW,get_dim)(__isl_keep PW *pw)
 679 {
 680         return pw ? isl_dim_copy(pw->dim) : NULL;
 681 }
 682
 683 __isl_give PW *FN(PW,reset_dim)(__isl_take PW *pw, __isl_take isl_dim *dim)
 684 {
 685         int i;
 686
 687         pw = FN(PW,cow)(pw);
 688         if (!pw || !dim)
 689                 goto error;
 690
 691         for (i = 0; i < pw->n; ++i) {
 692                 pw->p[i].set = isl_set_reset_dim(pw->p[i].set,
 693                                                  isl_dim_copy(dim));
 694                 if (!pw->p[i].set)
 695                         goto error;
 696                 pw->p[i].FIELD = FN(EL,reset_dim)(pw->p[i].FIELD,
 697                                                   isl_dim_copy(dim));
 698                 if (!pw->p[i].FIELD)
 699                         goto error;
 700         }
 701         isl_dim_free(pw->dim);
 702         pw->dim = dim;
 703
 704         return pw;
 705 error:
 706         isl_dim_free(dim);
 707         FN(PW,free)(pw);
 708         return NULL;
 709 }
 710
 711 int FN(PW,has_equal_dim)(__isl_keep PW *pw1, __isl_keep PW *pw2)
 712 {
 713         if (!pw1 || !pw2)
 714                 return -1;
 715
 716         return isl_dim_equal(pw1->dim, pw2->dim);
 717 }
 718
 719 __isl_give PW *FN(PW,morph)(__isl_take PW *pw, __isl_take isl_morph *morph)
 720 {
 721         int i;
 722
 723         if (!pw || !morph)
 724                 goto error;
 725
 726         isl_assert(pw->dim->ctx, isl_dim_equal(pw->dim, morph->dom->dim),
 727                 goto error);
 728
 729         pw = FN(PW,cow)(pw);
 730         if (!pw)
 731                 goto error;
 732         isl_dim_free(pw->dim);
 733         pw->dim = isl_dim_copy(morph->ran->dim);
 734         if (!pw->dim)
 735                 goto error;
 736
 737         for (i = 0; i < pw->n; ++i) {
 738                 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
 739                 if (!pw->p[i].set)
 740                         goto error;
 741                 pw->p[i].FIELD = FN(EL,morph)(pw->p[i].FIELD,
 742                                                 isl_morph_copy(morph));
 743                 if (!pw->p[i].FIELD)
 744                         goto error;
 745         }
 746
 747         isl_morph_free(morph);
 748
 749         return pw;
 750 error:
 751         FN(PW,free)(pw);
 752         isl_morph_free(morph);
 753         return NULL;
 754 }
 755
 756 int FN(PW,foreach_piece)(__isl_keep PW *pw,
 757         int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
 758         void *user)
 759 {
 760         int i;
 761
 762         if (!pw)
 763                 return -1;
 764
 765         for (i = 0; i < pw->n; ++i)
 766                 if (fn(isl_set_copy(pw->p[i].set),
 767                                 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
 768                         return -1;
 769
 770         return 0;
 771 }
 772
 773 static int any_divs(__isl_keep isl_set *set)
 774 {
 775         int i;
 776
 777         if (!set)
 778                 return -1;
 779
 780         for (i = 0; i < set->n; ++i)
 781                 if (set->p[i]->n_div > 0)
 782                         return 1;
 783
 784         return 0;
 785 }
 786
 787 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
 788         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 789                     void *user), void *user)
 790 {
 791         int i;
 792
 793         if (!set || !el)
 794                 goto error;
 795
 796         for (i = 0; i < set->n; ++i) {
 797                 isl_set *lift;
 798                 EL *copy;
 799
 800                 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
 801                 lift = isl_set_lift(lift);
 802
 803                 copy = FN(EL,copy)(el);
 804                 copy = FN(EL,lift)(copy, isl_set_get_dim(lift));
 805
 806                 if (fn(lift, copy, user) < 0)
 807                         goto error;
 808         }
 809
 810         isl_set_free(set);
 811         FN(EL,free)(el);
 812
 813         return 0;
 814 error:
 815         isl_set_free(set);
 816         FN(EL,free)(el);
 817         return -1;
 818 }
 819
 820 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
 821         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 822                     void *user), void *user)
 823 {
 824         int i;
 825
 826         if (!pw)
 827                 return -1;
 828
 829         for (i = 0; i < pw->n; ++i) {
 830                 isl_set *set;
 831                 EL *el;
 832
 833                 set = isl_set_copy(pw->p[i].set);
 834                 el = FN(EL,copy)(pw->p[i].FIELD);
 835                 if (!any_divs(set)) {
 836                         if (fn(set, el, user) < 0)
 837                                 return -1;
 838                         continue;
 839                 }
 840                 if (foreach_lifted_subset(set, el, fn, user) < 0)
 841                         return -1;
 842         }
 843
 844         return 0;
 845 }
 846
 847 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
 848         enum isl_dim_type dst_type, unsigned dst_pos,
 849         enum isl_dim_type src_type, unsigned src_pos, unsigned n)
 850 {
 851         int i;
 852
 853         pw = FN(PW,cow)(pw);
 854         if (!pw)
 855                 return NULL;
 856
 857         pw->dim = isl_dim_move(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
 858         if (!pw->dim)
 859                 goto error;
 860
 861         for (i = 0; i < pw->n; ++i) {
 862                 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
 863                                                 dst_type, dst_pos,
 864                                                 src_type, src_pos, n);
 865                 if (!pw->p[i].set)
 866                         goto error;
 867                 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
 868                                         dst_type, dst_pos, src_type, src_pos, n);
 869                 if (!pw->p[i].FIELD)
 870                         goto error;
 871         }
 872
 873         return pw;
 874 error:
 875         FN(PW,free)(pw);
 876         return NULL;
 877 }
 878
 879 __isl_give PW *FN(PW,realign)(__isl_take PW *pw, __isl_take isl_reordering *exp)
 880 {
 881         int i;
 882
 883         pw = FN(PW,cow)(pw);
 884         if (!pw || !exp)
 885                 return NULL;
 886
 887         for (i = 0; i < pw->n; ++i) {
 888                 pw->p[i].set = isl_set_realign(pw->p[i].set,
 889                                                     isl_reordering_copy(exp));
 890                 if (!pw->p[i].set)
 891                         goto error;
 892                 pw->p[i].FIELD = FN(EL,realign)(pw->p[i].FIELD,
 893                                                     isl_reordering_copy(exp));
 894                 if (!pw->p[i].FIELD)
 895                         goto error;
 896         }
 897
 898         pw = FN(PW,reset_dim)(pw, isl_dim_copy(exp->dim));
 899
 900         isl_reordering_free(exp);
 901         return pw;
 902 error:
 903         isl_reordering_free(exp);
 904         FN(PW,free)(pw);
 905         return NULL;
 906 }